form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Public Class Form1
    Inherits System.Windows.Forms.Form
    Private i, j, x, y As Integer
    Private rgbpoint(1024, 768) As rgbp
    Private Structure rgbp
        Dim r As Integer
        Dim g As Integer
        Dim b As Integer
    End Structure
#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写处置以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox2 As System.Windows.Forms.PictureBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.PictureBox2 = New System.Windows.Forms.PictureBox
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox1.Location = New System.Drawing.Point(8, 8)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(176, 264)
        Me.PictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'PictureBox2
        '
        Me.PictureBox2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox2.Location = New System.Drawing.Point(280, 8)
        Me.PictureBox2.Name = "PictureBox2"
        Me.PictureBox2.Size = New System.Drawing.Size(176, 264)
        Me.PictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage
        Me.PictureBox2.TabIndex = 1
        Me.PictureBox2.TabStop = False
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(192, 128)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "转换为灰度"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(192, 88)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 3
        Me.Button1.Text = "打开图片"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(192, 168)
        Me.Button3.Name = "Button3"
        Me.Button3.TabIndex = 5
        Me.Button3.Text = "关闭窗口"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(464, 289)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.PictureBox2)
        Me.Controls.Add(Me.PictureBox1)
        Me.Menu = Me.MainMenu1
        Me.Name = "Form1"
        Me.Text = "彩色图片转换成灰度图片"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Sub getrgbp()
        Dim tempcolor As Color
        Dim newbitmap As Bitmap = Me.PictureBox1.Image
        x = newbitmap.Width
        y = newbitmap.Height

        For i = 0 To x - 1 Step 1
            For j = 0 To y - 1 Step 1
                tempcolor = newbitmap.GetPixel(i, j)
                rgbpoint(i, j).r = tempcolor.R
                rgbpoint(i, j).g = tempcolor.G
                rgbpoint(i, j).b = tempcolor.B
            Next
        Next
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim temprgb As rgbp
        Dim newbitmap As Bitmap
        Dim tempcolor As Color
        newbitmap = Me.PictureBox1.Image.Clone

        Call getrgbp()
        For i = 1 To x - 1 Step 1
            For j = 1 To y - 1 Step 1
                temprgb.r = rgbpoint(i, j).r + rgbpoint(i, j).g + rgbpoint(i, j).b
                temprgb.g = temprgb.r
                temprgb.b = temprgb.r
                temprgb.r = temprgb.r \ 3
                temprgb.g = temprgb.g \ 3
                temprgb.b = temprgb.b \ 3
                newbitmap.SetPixel(i, j, _
                Color.FromArgb(temprgb.r, temprgb.g, temprgb.b))
            Next
        Next
        PictureBox2.Image = newbitmap
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim opendia As OpenFileDialog
        opendia = New OpenFileDialog
        opendia.ShowDialog()
        Dim newbitmap As Bitmap
        Try
            Me.PictureBox1.Image = New Bitmap(opendia.FileName)
        Catch
            Me.PictureBox1.Image = New Bitmap("..\黄山云海.bmp")
        End Try
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        End
    End Sub
End Class